I've degraded 1.05 to 1.04 successfully, here is the 1.04 link
http://drivers.softpedia.com/get/SCANNER-Digital-CAMERA-WEBCAM/CANON/Canon-EOS-Rebel-T4i-Camera-Firmware-104.shtml
http://drivers.softpedia.com/get/SCANNER-Digital-CAMERA-WEBCAM/CANON/Canon-EOS-Rebel-T4i-Camera-Firmware-104.shtml